Inverted Hybrid Light-Emitting Diodes Using Carbon Dots as Selective Contacts: The Effect of Surface Ligands

We describe the use of carbon dots (C-Dots) as selective contacts for electronic holes in inverted hybrid light-emitting diodes. Moreover, we have studied the effect of the C-Dots’ amine-derivative surface ligands and their impact on the device performance. The different surface ligands affect not o...

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Bibliographic Details
Published inACS applied electronic materials Vol. 2; no. 5; pp. 1388 - 1394
Main Authors Paulo-Mirasol, Sofia, Gené-Marimon, Santi, Martínez-Ferrero, Eugenia, Palomares, Emilio
Format Journal Article
LanguageEnglish
Published American Chemical Society 26.05.2020
Subjects
carbon dots
amine-based ligands
optoelectronic properties
light-emitting diodes
capping ligands
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Summary:We describe the use of carbon dots (C-Dots) as selective contacts for electronic holes in inverted hybrid light-emitting diodes. Moreover, we have studied the effect of the C-Dots’ amine-derivative surface ligands and their impact on the device performance. The different surface ligands affect not only the optical properties of the C-Dots but also the device turn-on voltage and the luminance parameters despite not forming part of the emissive layer. For instance, the C-Dots capped with the aromatic ring p-phenylenediamine show unfavorable effects, whereas the effect of nonaromatic capping ligands depends upon the length of their molecular backbone.
ISSN:2637-6113
2637-6113
DOI:10.1021/acsaelm.0c00163